Document BOMQmb0xj12N9wLOkxjzwvVm
Heating Ventilating Air Conditioning Guide 1938'
Table 1. Design Dry- and Wet-Bulb Temperatures, Wind Velocities, and Wind Directions for June, July, August, and September
Stats
City
Design Dst-Bulb
WDeet-sBigunlb
Summer Wind Prevailing
VeMloPcHity
Summer Wind Direction
Ala------------- Birmingham......... ............... Mobile..................................
Ark. Calif.
San Francisco.......... -..... -- Colo.......... -- Denver..................................
Dela_______ D. C. FI*
Oa
Wilmington................... .....
Tampa.............. -..... ;......... Savannah............... ....... ....
Til Peoria...................................
'. Ind --;--: Indianapolis..... ....... ............ Iowa_______ Des Moines...... ...:--- ---------
- KV LeL......:
New Orleans..................!.....
'Maine.-.__ Portland-..................... ....... MH
Mass....... _... Boston----------- --- --------------
Minn.______ Minneapolis. ..... -..........
- Miss.. ___ Vicksburg..... ......... .........
Mo________ Kansas City.--............... --.
St. Louis.______:.TM-----------
Monti--
Helena.... :....:;... .........--
. Nebr_____ .. Lincoln. ....... ..... ... ..............
Nev.... __ Reno--- --------- ----------------
N. H............ Manchester..... ..... ;-----------
N. I.
N Y.
Buffalo----------------------------
N. M............ Santa Fe..... ;_____ ___ ____ N. C............. Asheville..... ................ - ...
Wilmington-----------------...... N Dak.
Ohio............. Cleveland------- ---------Cincinnati................--.... .--
Oreg_______ Pa.............
RT s. c...:____
S. Dak.
Portland............ . . ---------Philadelphia------------- -------Pittsburgh........... .......... ......
Charleston-----------------:----Greenville____________ 1-- Sioux Falls.______________
Memphis::-----------------------
95 78 95 80 105 76 95. 78 90 70 90 65. 95 64 95 75 95 78 95 78 95 78 94 79 95 75 95 78 95 65 95 75 95 76 95 . 76 95 77 100 75
95 76 95 79 90 73 95 78 92 75 95 75 95 75 95 78 100 76 95 78 95 67 95 75 95 65 90 73 95 78 92 . 75 93 75 95 . 75 . 90 65 90 75 95 79 95 73 95 75 95 . 78 101 76 90 65 95 78 95 . 75 93 75 95 80 .95 76 95 75 95 77 95 ' 78
5.2
8.6
6.0
7.0
6.0
11.0
6.8 7.3 9.7 6.2
8.7 7.0 7.3 7.8 5.8 10.2
8.2
9.0 6.6
11.0
8.0 7.0 7.3 6.9 9.2 10.3 8.4
6.2 9.5 9.4
7.3. 9.3 7.4 5.6 10.0 . 7.1 12.2 12.9 6.5 . 5.6 7.8 .8.8 9.9 6.6 10.1 6.6 9.7 9.0 10.0 9.9 6.8 7.6 6.5 7.5
.
s sw
w NE
SW SW
S
S
SW S SW E
MW SW NW NE
S SW sw
s sw
sw s
sw sw sw SE sw
S sw sw
S w NW sw s sw sw SE SE
SW NW
S SW
S NW SW NW
NW
. SW NE s SW
SW
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Chapter 8. Cooling Load
Table 1. Design Dry and Wet-Bulb Temperatures, Wind Velocities, and Wind Directions for June, July, August, and September (Continued)
- State
City
Design Dry-Bulb
Design Wet-Bulb
Summer Wind Velocity MPH
Prevailing Summer Wind
Direction
100 78 9 4 s
Galveston--........................... 95
80
9.7
S
San Antonio........................... 100
78
7.4 SE
Houston.................................. 95
78
7.7
S
El Paso................ ................... 100
69
6.9
E
Vf
Va
Salt Lake City. .................. Burlington..............................
Norfolk. ................................
95
90 95
67 73
78
ft,2
RQ in Q
SE 3 c
Richmond............................... 95
78
6.2 sw
85 65
79
Spokane..........................
90 65
6.5 sw
W. Va..... . Parkersburg. .......................
95
75
5.3 SE
Wise............ Madison.................................
95
75
8.1 SW
Milwaukee....................... 95 75 10.4
s
Wyo.. -...... Cheyenne............................... 95
65
9.2
S
temperatures given are not exceeded more than 5 to 8 per cent of the time during a cooling season of 1200 hours in June, July, August and September for an average year.
COMPONENTS OF HEAT GAIN
A cooling load determination is composed of five components which may be classified in the following manner:
1. Normal heat transfer through windows, walls, partitions, doors, floors, ceilings, etc. 2. Transfer of solar radiation through windows, walls, doors, skylights, or roof. 3. Heat emission of occupants within enclosures. 4. Heat introduced by infiltration of outside air or controlled ventilation. 5. Heat emission of mechanical, chemical, gas, steam, hot water and electrical appliances located within enclosures.
The components of heat g3in, classified by source are further classified as sensible and latent heat gain.
The first two components fall into the classification of sensible heat gain, that is, they tend to raise the temperature of the air within the structure. The last three components not only produce sensible heat gain.but they may also tend to increase the moisture content of the air within the structure.
Normal Heat Transmission
By normal heat transmission, as distinguished from solar heat trans mission is meant the transmission of heat through windows, walls, partitions, etc. from without to interior of enclosure by virtue of difference between outside and inside air temperatures. This load is calculated in a
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